| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.164 | 0.591 | 1.413 | 6.514 |
| Arsenic | As (ppm) | 7.036 | 0.910 | 3.618 | 8.821 |
| Calcium | Ca (wt%) | 11.976 | 2.732 | 3.971 | 27.452 |
| Copper | Cu (ppm) | 14.547 | 4.847 | 7.077 | 47.376 |
| Iron | Fe (wt%) | 1.854 | 0.301 | 0.736 | 3.231 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.041 |
| Magnesium | Mg (wt%) | 0.654 | 0.109 | 0.270 | 0.991 |
| Manganese | Mn (ppm) | 375.546 | 59.543 | 148.850 | 753.860 |
| Sodium | Na (wt%) | 0.626 | 0.155 | 0.146 | 1.298 |
| Phosphorus | P (wt%) | 0.061 | 0.008 | 0.033 | 0.091 |
| Lead | Pb (ppm) | 16.257 | 5.376 | 5.148 | 71.438 |
| Selenium | Se (ppm) | 0.279 | 0.109 | 0.100 | 1.088 |
| Titanium | Ti (wt%) | 0.266 | 0.048 | 0.074 | 0.471 |
| Zinc | Zn (ppm) | 63.543 | 11.723 | 27.239 | 116.214 |